- Check a certificate: Check a certificate and return information about it (signing authority, expiration date, etc.):
openssl x509 -text -noout -in server.crt
- Check a key: Check the SSL key and verify the consistency:
openssl rsa -check -in server.key
- Check a CSR: Verify the CSR and print CSR data filled in when generating the CSR:
openssl req -text -noout -verify -in server.csr
- Verify a certificate and key matches: These two commands print out md5 checksums of the certificate and key; the checksums can be compared to verify that the certificate and key match.
openssl x509 -noout -modulus -in server.crt | openssl md5 openssl rsa -noout -modulus -in server.key | openssl md5
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openssl commands to check certificate, request and private key
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